Demand Is High for Power Ports,
But They Are Still Hard to Find

Six out of every 10 business travelers who carry their laptop computer onto a plane actually take it out during the flight, according to a 1998 survey by travel-information publisher OAG.

But whether road warriors are able to use their laptops for any longer than the two to four hours it takes for the battery to wind down is a murkier question. And the answer -- the availability of plug-in electric power ports -- varies wildly from...